Valve mechanism



Feb, 15, 1949. J, c, CURHS mL 2,461,529

VALVE MEGHANISM original Filed July 1, 1943 2a' 919,@ f6- f 19 E999; 7

y 4 Mau.

Patented Feb. 1s, 1949 Zl@ VALVE MECHANISM John-C. 'Curtis and 'Elmer G.Ga1tin, Claremont,

H., assignors to Joy Manufacturngompany, acm-poration of Pennsylvania Original Yapplication .lliily 1, 19543, Serial "No '493,GS6. Divided and this application J unej22, 1944, Serial No. 541,568

Sl'Claiins. (Cl. 251-+91.) .l This Vinvention relates to valve mechanisms a'pressureuid'actuatedhammerzmotor. 3which and Ymore particularly .to improvements in a issupportedand fed bygapressure fluid actuated i throttle valve mechanism vof a pressure liuid feeding 'means lIl. Evidently, the ,improved actuated, hammerroclcdrill. throttle valve mechanism may' he .embodied in :Anobj'ect of the present invention is :to pro- 'i5 other types .of pressureiluid actuated :rnechann vide. animproved valve mechanism. .Another obisms.

ject is to provide an .improved .throttle valve The .improvedthrottle lvalve mechanism :I .is

mechanism forfa hammer-:rock drill of thepresarranged atV one side of vthe hammer motor and sure iluidactuated typeffor controlling the now feeding ymeans with itsa-Xis of rotation disposed of pressureffluid thereto. Aiurther object is ltodo in parallelism with-:the 4longitudinal axis of the provide an. improved .throttle valve `mechanism hammer motor and: the feeding .means The embodyinganiimproved,throttle valve and handle valve mechanism includes a rotary grasping construction whereby :operation of `the "valve is handler-Swhichis preferably*oftubular-form. and facilitated. Afstillgfurther object to .provide is corrugated or longitudinally ribbed :at .5 on anjmproved bearing .mounting-'fortthethrottle l5 its exterior to facilitate gripping thereof. The valve mechanism whereby the :valve operating handle is journaled at its endsrespectively in a handle .isV provided with vspaced `bearings at .the front bracket 'I vrintegral with thefoylinder of the opposite ends thereof. Yet another object is to hammer motor and upona :rear boss 8 integral provide an improved `throttle :valve mechanism with'the rear head block S of the hammer motor. embodying .pressure :,iluid operated means for y20 The'front bracket has la bore il! receiving abushcounterbalancing toa substantial dcgreeth-e ending l l in Vwhich a reduced stein rvlzfonthe handle wise thrust on the valve by subiecting the valve E, is journaled. Axially alined with thehandle is to aan opposing thrust. Still .another object is a bore i3 in a valvecasing i4 integral with the to provide 'an improved connection between the head block 9, .and la rotary throttle valve .l5 yof valve and its operating handle permitting -free 25 cylindric form yis arranged `in the zhere. The axial movementoi the handle relative to the valve throttle valve .has a valve stem I6, generally While preventing l`relative rotation therebetween. square. in cross section, slidinglvtted ina square These and other objectsfand advantages of the recess Vl inthe valve handle'fso that'the valve invention will, however, hereinafter more fully is connected to the handle for rotation thereby. appear. 30 Attached at I8 to the rearhead-block is a con- This application is 'a Adivision of copending ventonalhose connection wier vsupplying fluid application rSerialNo. 4931,0-86 ledfJuly 1,1943. under pressureto .the ,hollowinterior 2% of the V'In the accompanying ldrawing there .is shown throttle valve, and the uid owing to the valve for purposes of illustration one form which the acts `on the lower lend of .the valve .tof force the invention may assume in practice. 35 latter upwardly within thel valve receiving bore i3. In this drawing: To `offset -to a substantial degree the eiect of 'Fia 1 ViS a vertalseilonal View, With parts in thepressureoffthe uidacting onthe lower end elevation, ythrough a throttle .valve mechanism of the throttle Valverthere is providedk a packed constructed .in accordance with an illustrative piston .gig .attached ,by .a .scfew 22 v1-,0 the valve embodiment-'of the invention, i0 and itting a bore .23 of the valve handle .5 as

,Fina isa view similari* :to Eig, '1, with certain. Clearly shown in Figs. 1 and 2. Fluid under parts shown-,in verticalfsectionandothers shown pressure may `he,admittedto thehandle boref23 ingelevation, illustrating structural details oi the from the valve interior 20 throughanmalpas-' improved'valve mechanism. sage te inthe screw 22. Pressure iluid. acting Aon Fig. 3 is a,horizontal.sectionalvew taken subli5 the upper ppessurezarea of the piston 2.! tends :to stantially .0n line :3 3 0f .Fg., 2. force the throttle valve downwardly, inopposition Y Figs. 4,5,-6 vand lrare horizontal sectional views tovtherupwardly acting pressure on the .lower end takenfrespectively on vlines ill-4, .l- #5, 6--6 l.and ofthe val-ve, and the pressure of the fluid acting 'l--lnof Fig. 1. on the upper walli-of the handle bore 23 serves In .this illustrative embodiment of the inven- 5G to hold the handle stem IZupWardly in its, bushtiontheiinproved throttle valvemechanism, gen* ing il. To absorb the axial upwardthruse of erallyrlesignated l', is yshownassociated with a the valve handle 5, there is provided an endhamme1';rock :drill-generally designated 2, ythe thrustbearing 26 engaging athrust washer 21 latterfheing iully 4disclosed copending apnliseatedagainst the upper wall 2.a ofthe ybracket cation Serial..Nos493.;8.. "lillefrockidrillfincludes bore itV (see Fir-g. ll). Buetovthe provision of 3 the opposing pressures at the opposite ends of the throttle valve, rotation of the valve is made relatively easy.

Now referring to the specic structure oi the throttle valve per se, it Will be noted that the throttle valve l5 has a port 29 (see Figs. l and 4) for connecting the valve interior 20 with a chamber 38 communicating with the inlet passages of the hammer motor 3. The throttle valve has a port 3l (Fig. 5) for connecting the hollow interior 2li of the throttle valve with a circumferentially extending groove 32 on the valve periphery, and this groove is communicable with a feed supply passage 33 leading to the feeding means. The throttle valve has a port 34 communicating with a peripheral groove 35 which is communicable with a passage 36 leading to the lubricator of the drill. Extending longitudinally along the exterior periphery of the throttle valve are shallow' lubricantgrooves 3l and 38 communicating at the upper ends with an annular groove 39, and lubricant may flow through these grooves to lubricate the walls of the valve receiving bore I3 in an obvious manner. The groove 38 communicates with a peripheral groove 39 which is communicable with the motor in the passage Sil. As shown in Fig. 7, rotary movement of the throttle valve l5 is limited by a spring-pressed detent element 49 projecting within a peripheral groove di on the valve. A screw plug 2 holds the spring 43 under compression and is removable to obtain access to the parts. This detent element serves to hold the throttle valve in its different position of adjustment.

As a result of this invention an improved throttle valve mechanism is provided having a novel valve and handle construction whereby operation of the valve is facilitated. By the provision of the valve piston in the bore of the throttle valve handle, the pressure acting on the lower end of the throttle valve is opposed, resulting in a smaller net upward longitudinal thrust on the valve, so that the valve may be easily turned and at the same time the valve handle is held upwardly in position against its upper bearing. By the provision of the longitudinally spaced bearings at the opposite ends or the valve handle, the mounting of the valve is improved, and, by the arrangement ci the handle longitudinally at one side of the drill, the valve may be readily operated. Other advantages of the invention will be clearly apparent to those skilled in the art.

While there is in this application specically described one form which the invention may assume in practice, it will be understood that this form of the same is shown for purposes of illustration and that the invention may be modied and embodied in various other forms Without departing from its spirit or the scope of the appended claims.

What we claim as new and desire to secure by Letters Patent is:

1. In a valve mechanism, the combination comprising a control valve, a rotary control handle coaxial therewith, means providing bearings by means of which the opposite ends of said handle are respectively journaled, said bearings permitting limited axial movement of the handle, and pressure fluid operated means for urging said handle axially relative to said valve in the direction toward one of said bearings from the other.

2. In a valve mechanism, the combination comprising means providing spaced bearing portions, a rotary handle extending between said portions and journaled by means of the bearings thereof, said handle being mounted for limited axial movement and one of said bearings being a thrust bearing and receiving the axial thrust of said handle, a control valve arranged in alinement with said handle and operatively connected thereto, said valve having a pressure area, means for supplying pressure iiuid to said valve, the uid acting on said pressure area of said valve to exert an endwise thrust thereon in one direction, pressure fluid operated mea-ns eiective upon uid supply to said valve and associated with said handle for exerting in all positions of the valve an axial thrust on said valve in the opposite direction to reduce the net end-Wise thrust on the valve in said one direction, and operative connections between said handle and said valve permitting limited relative axial movement therebetween While preventing relative rotative movement.

3. In a valve mechanism, means providing a pair of spaced projections each having a bearing, a handle extending between said projections and journaled at its ends by means of said bearings, one of said projections having a bore, a rotary throttle valve contained in said bore in alinement with said handle and to which the latter is operatively connected, means for subjecting said valve to the action of pressure fluid to exert an end- Wise thrust on said valve in one direction, and pressure fluid operated means elective in al1 positions of the valve and associated with said handle for subjecting said valve to an endwise thrust in the opposite direction to reduce the net endwise thrust on the valve in said one direction.

4. A valve mechanism including a rotary Valve having a pressure area at one end thereof, an alined operating handle therefor, said pressure area at the end of said valve remote from said handle, means for operatively connecting said handle to said valve permitting limited relative axial movement therebetween while preventing relative rotation, bearing means for said valve and handle, means for supplying pressure duid to said valve at one end thereof, the fluid in said supply acting on said pressure area of said valve for imparting an endwise thrust on said valve toward said handle, and pressure uid operated means acting between said valve and handle forl opposing said endwise thrust, the uid acting on said last mentioned means concurrently acting on said handle to move the handle axially relative to said valve toward one of said bearing means.

5. A valve mechanism comprising a rotary valve having a pressure area, a handle alined with said valve for operating the same, means for operatively connecting said valveandv handle permitting limited relative axial movement therebetween while preventing relative rotation, bearing means for said valve and handle, a fluid supply, the fluid in said supply acting on said pressure area of said valve for exerting an endwise thrust thereon in a direction toward said handle, and pressure uid operated means acting between said valve and handle for reducing said endwlse thrust by subjecting said valve to a smaller opposing pressure, said opposing pressure concurrently exerting an endwise thrust on said handle in the opposite direction toward a bearing means.

6. A valve mechanism including a rotary valve, a handle for said valve arranged in axial alinement therewith and supported independently of said valve, means for supplying pressurefluid to said valve, means subjected to the pressure of the fiuid in said supply means for exerting an axial thrust on said valve in a directiontoward said handle, and pressure uid operated means effective upon fluid supply to said valve for reducing said endwise thrust by subjecting said valve to a smaller opposing pressure, said pressure fluid operated means being associated With said Valve and handle and the fluid exerting such counterbalancing pressure on said valve concurrently exerting an axial thrust on said handle in a direction away from said valve.

7. A rotary throttle valve mechanism including a throttle valve, uid supply means controlled by said valve, the uid flowing to said valve acting on one end thereof, and uid operated means for opposing' the pressure produced by the action of iluid on said one end and effective in all `positions of said valve and including a piston secured to said valve against relative axial movement and subjected to fluid pressure and acting on the opposite end of said valve.

8. A rotary throttle valve mechanism including a valve and an operating handle for said valve, said handle having a bore, iluid supply means controlled by said valve, the fluid flowing to'said valve acting on one end thereof, and uid operated means for opposing the pressure produced by the action of fluid on said one end and including a piston contained in said handle bore and subjected to fluid pressure and acting on the opposite end of said valve, said piston and handle being mounted for relative axial movement.

l 9. In a valve mechanism, the combination comprising a control valve, a rotary control handle alined with and operatively connected to said valve for operating the latter, supporting means c providing bearings by means of which the opposite ends of said handle are respectively journaled, means for supplying pressure fluid to said valve, said valve having an effective pressure'area on which the iluid in said supply means acts for exerting an axial thrust on said valve in one direction, and pressure fluid operated means effective upon fluid supply to the Valve and associated with said handle for opposing the axial thrust on the valve, the effective pressure area on which the fluid acts in said one direction being somewhat y greater than the opposing pressure area so that the valve is held in one axial position against one of said bearings and said handle having an eil'ective pressure area on which the iluicl acts whereby the handle is concurrently urged in the same direction against another of said bearings.

Jo-HN c. CURTIS. ELMER G. GARTIN.

REFERENCES CITED The allowing references are ci" record in the file of this patent:

UNITED STATES PATENTS y Date IShipley May 11, 1937 

